メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.0750000 35.1833333, 133.0812500 35.1833333, 133.0812500 35.1875000, 133.0750000 35.1875000, 133.0750000 35.1833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral